MOTORS
Troubleshooting Low supply voltage
Motor does not start.
Blown fuse Excess load Faulty wire connection Broken wire in control device Broken wire in field coil Broken wire in armature coil
Charge battery and improve power supply condition. Replace. Reduce load. Repair, or re-tighten wire connections. Repair or replace. Repair or replace. Repair or replace.
Motor starts but does not run at rated speed.
Low supply voltage Faulty connection at armature circuit
Charge battery and improve power supply condition. Repair connections.
Motor produces abnormal vibrations and noise.
Defective bearings Loose mounting bolts Contact between armature and field coil
Replace bearings. Retighten bolts and nuts. Repair or replace.
Incorrect installation Severe external vibration
Correct installation condition. Remove the cause of vibration, or take appropriate vibration-insulating measures. Replace. Replace.
Bearing overheats. Defective bearings Oil degradation or shortage in bearings
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